Unit Introduction; Fire And Explosion Hazard - Payne PY3G Series Owner's Manual

UNIT INTRODUCTION

This PY3G unit is a small packaged gas heat/electric cooling system
that can utilize the comfort of gas heating packaged along with effi-
cient electric air conditioning. This unit uses R- -410A, the ozone
friendly refrigerant for cooling.
Starting or Shutting Off Unit
Note:Your combination heating/cooling unit is equipped with an
automatic direct spark ignition and power combustion blower.
To start unit gas heat:
Refer to Fig. 2 for location of unit front access panel. Refer to Fig.
3 for location of gas valve. Refer to Fig. 4 while proceeding with the
following steps.
1. Set the temperature selector on room thermostat to the lowest
temperature setting and set system switch to HEAT.
2. Close the external manual gas shutoff valve.
3. Turn off the electrical supply to the unit.
4. Remove the front access panel with a 5/16- -in. nut driver.
5. Move the selector switch on the internal gas valve to the OFF
position and wait 5 minutes.
6. Move the selector switch on the internal gas valve to the ON
position.
7. Replace the front access panel.
8. Turn on the electrical supply to unit.
9. Open the external manual gas shutoff valve.
10. Set the temperature selector on room thermostat slightly
above room temperature to start unit. The induced- -draft
combustion air fan will start. Main gas valve will open and
main burners should ignite within 5 seconds. If the burner
does not light within 5 seconds, the ignition module will go
into a Retry Mode after a period of approximately 22
seconds (following the 5- -second ignition period). If the
burners do not light within 15 minutes of the initial call for
heat, there is a lockout.
11. Set the temperature selector on room thermostat to desired
setting.
FILTER ACCESS
PANEL*
*For accessory filter rack.
Fig. 2 - - Accessory Filter Rack Access Panel
To shut off unit gas heat:
Note:If the unit is being shut down because of a malfunction, call
your dealer as soon as possible.
Should overheating occur or the gas supply fail to shut off, shut off
the external manual gas valve to the unit before shutting off the elec-
trical supply. Do not use this unit if any part has been under water.
Immediately call a qualified service technician to inspect the unit
and to replace any part of the control system and any gas control
which has been under water.
Refer to Fig. 5 while proceeding with the following steps.
To start unit electric cooling:
Refer to Fig. 6 while proceeding with the following steps.
To shut off unit electric cooling:
ACCESS PANEL
Refer to Fig. 7 while proceeding with the following steps.
A05121
3
WARNING
!

FIRE AND EXPLOSION HAZARD

Failure to follow this warning could result in personal injury,
death, and/or property damage.
1. If the main burners fail to light, or the blower fails to start,
shut down gas heating section and call your dealer for service.
2. Never attempt to manually light the main burners on unit
with a match, lighter, or any other flame. If the electric
sparking device fails to light the main burners, refer to the
following shutdown procedures, then call your dealer as soon
as possible.
WARNING
!
FIRE, EXPLOSION,
HAZARD
Failure to follow this warning could result in personal injury,
death, and/or property damage.
Do not turn off the electrical power to unit without first
turning off the gas supply.
1. Set the temperature selector on room thermostat to lowest
temperature setting and set system SWITCH to OFF.
2. Close the external manual shutoff valve.
3. Turn off the electrical power supply to the unit.
4. Remove the front access panel.
5. Move the selector switch on the internal gas valve to the OFF
position.
6. Replace the front access panel.
1. Set the temperature selector on room thermostat to highest
temperature setting and set system SWITCH to OFF.
2. Close the external manual shutoff valve.
3. Turn off the electrical power supply to the unit.
4. Remove the front access panel.
5. Move the selector switch on the internal gas valve to the OFF
position.
6. Replace the front access panel
7. Restore electrical power to the unit and set system switch to
COOL.
8. Set the temperature selector on room thermostat slightly be-
low the room temperature to start unit.
1. Set the temperature selector on room thermostat to highest
temperature setting and set system SWITCH to OFF.
2. Close the external manual shutoff valve.
3. Turn off the electrical power supply to the unit.
ELECTRICAL SHOCK